Final answer:
The nurse would instruct the nursing assistive personnel (NAP) to report any signs of pain or discomfort exhibited by the patient, such as grimacing, guarding, or unusual behavior. Hence, option c is the correct answer.
Step-by-step explanation:
The nurse would instruct the nursing assistive personnel (NAP) to report any signs of pain or discomfort exhibited by the patient, such as grimacing, guarding, or unusual behavior. By informing the nurse of these observations, the NAP can assist in assessing the patient's pain level and provide timely intervention.
This communication is crucial in ensuring that the patient's pain is effectively managed. Therefore, option c, 'Be sure to tell me if you notice grimacing, guarding, or any unusual behavior,' is the correct answer.